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| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2009-12-07 12:51:30 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2009-12-07 12:51:31 +0100 |
| commit | 454e1fa1ebae7cff707b2e3f12b775c263c8408b (patch) | |
| tree | eab290fcacd6faaf7e01e3a637cb9678bb367c66 /arch/s390 | |
| parent | 4257aaecffab77bad43e12057f56a5590b360f9f (diff) | |
| download | linux-454e1fa1ebae7cff707b2e3f12b775c263c8408b.tar.gz linux-454e1fa1ebae7cff707b2e3f12b775c263c8408b.tar.bz2 linux-454e1fa1ebae7cff707b2e3f12b775c263c8408b.zip | |
[S390] cio: split PGID settings and status
Split setting (driver wants feature enabled) and status (feature
setup was successful) for PGID related ccw device features so that
setup errors can be detected. Previously, incorrectly handled setup
errors could in rare cases lead to erratic I/O behavior and
permanently unusuable devices.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/ccwdev.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h index 2a5419551176..f4bd346a52d3 100644 --- a/arch/s390/include/asm/ccwdev.h +++ b/arch/s390/include/asm/ccwdev.h @@ -142,6 +142,8 @@ struct ccw1; extern int ccw_device_set_options_mask(struct ccw_device *, unsigned long); extern int ccw_device_set_options(struct ccw_device *, unsigned long); extern void ccw_device_clear_options(struct ccw_device *, unsigned long); +int ccw_device_is_pathgroup(struct ccw_device *cdev); +int ccw_device_is_multipath(struct ccw_device *cdev); /* Allow for i/o completion notification after primary interrupt status. */ #define CCWDEV_EARLY_NOTIFICATION 0x0001 @@ -151,6 +153,8 @@ extern void ccw_device_clear_options(struct ccw_device *, unsigned long); #define CCWDEV_DO_PATHGROUP 0x0004 /* Allow forced onlining of boxed devices. */ #define CCWDEV_ALLOW_FORCE 0x0008 +/* Try to use multipath mode. */ +#define CCWDEV_DO_MULTIPATH 0x0010 extern int ccw_device_start(struct ccw_device *, struct ccw1 *, unsigned long, __u8, unsigned long); |